From an outsider's perspective, Paris seems well positioned for this. It's a dense city, cars don't feel like first class citizens outside of the large boulevards, the Vélib [1] bike sharing system is well implanted (and that's not even considering all of the shared/kick/electrical scooters..!)

Montréal is having a mini cycling renaissance as well. Our mayor didn't let the pandemic crisis go to waste and transformed one of the city's main streets by adding two semi-protected bike lanes [2]. The whole area is stunningly different than what it was before. A telling (Canadian newspaper) editorial on the subject: "Is the war against bike lanes finally over?" [3]

Finally, I personally just joined a group of volunteers (as a tech/developer) that are using DALL-E/AI to generate visions of improved streets in the US! If you're curious / want to join (fullstack and especially css developers are always needed), check out https://transformyour.city/ and the twitter account [4]. The goal is to be a "change.org for urban transformation". Feel free to email me as well.

Cyclists/urban idealists unite :-)

[1] https://en.wikipedia.org/wiki/V%C3%A9lib%27

[2] https://montreal.ca/en/articles/rev-express-bike-network-466...

[3] https://www.theglobeandmail.com/opinion/editorials/article-i...

[4] https://twitter.com/betterstreetsai